:wrench: Use internal c-periphery [skip ci]

diff --git a/plug b/plug
index 22994f697c81e7e104a370ec80e11509fab69039..4cef0d2b5329a7aeff0e6ef07454ae1bb9462f78 160000 (submodule)
--- a/plug
+++ b/plug
@@ -1 +1 @@
-Subproject commit 22994f697c81e7e104a370ec80e11509fab69039
+Subproject commit 4cef0d2b5329a7aeff0e6ef07454ae1bb9462f78